2021 BMW 4 Series 2.0 420i M Sport

Overview

• Make: BMW
• Model: 4 Series
• Trim: M Sport
• Version: 2.0 420i M Sport Auto RWD Euro 6 (s/s) 2dr (181 bhp)
• Year: 2021
• Mileage: 36,301 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 4 seats
• Engine: 2.0 litres, 181 bhp
• Gearbox: Automatic
• Drive: Rear-wheel drive
• Colour: White
• CO2: 151 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 36,301 miles, this 2021 BMW 4 Series M Sport has covered about 7,800 fewer miles than other 2021 BMW 4 Series cars. The dealer is asking £24,220, which is £673 below the AskCar estimate of £24,893. To work out the AskCar estimate, we analyse UK dealer adverts for 1,814 BMW 4 Series cars across different ages and specifications. The asking price is now £735 lower than when we first recorded the advert 63 days ago. Its advertised mileage matches the government's MOT record. You can find this car at Hippo Approved in Blackburn. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £673 (2%) under the AskCar estimate of £24,893.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 1,814 priced BMW 4 Series adverts across different ages and specifications, as of 4 November 2026.

A 2021 BMW 4 Series with the 2.0 petrol engine is typically advertised at £24,000: the median of the 144 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 BMW 4 Series has been on sale for at least 63 days.

Price history

AskCar first saw this advert on 2 September 2026 at £24,955. Its asking price is now £24,220, £735 less. The latest price cut was seen on 3 November 2026.

Price changes recorded:

• 2 September 2026: £24,955
• 8 September 2026: £23,920
• 25 September 2026: £24,320
• 30 September 2026: £24,300
• 2 October 2026: £24,280
• 9 October 2026: £24,240
• 14 October 2026: £24,300
• 16 October 2026: £24,280
• 17 October 2026: £24,340
• 23 October 2026: £24,320
• 24 October 2026: £24,340
• 3 November 2026: £24,220

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 8 August 2027.

It has had 3 MOTs. The latest, on 3 August 2026, passed.

Advisories at the latest test: front inner brake disc worn, pitted or scored, but not seriously weakened edge.

Mileage at that test: 35,545 miles, which matches the advertised 36,301 miles.

Advertised mileage is about 7,800 miles lower than the median mileage of a 2021 BMW 4 Series on AskCar.

Similar cars

45 other 2021 BMW 4 Series M Sport 2.0 petrol automatic coupes are for sale at UK dealers, from £17,490 to £27,975, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, grey. Mileage: 36,119 miles. Price: £23,115, £1,105 less than this car. Dealer: Carsa Durham in Durham. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-cc559415000b
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white. Mileage: 36,484 miles. Price: £22,949, £1,271 less than this car. Dealer: Motorpoint Glasgow in Glasgow. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-0818ea1bca21
• 2021 BMW 4 Series M Sport, 2.0 petrol coupe, black. Mileage: 36,929 miles. Price: £22,498, £1,722 less than this car. Dealer: Arnold Clark Wallsend Silverlink Citroen / Peugeot / Jeep / OMODA / JAECOO in Wallsend. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-50d97e73a146

• The nearest: 2021 BMW 4 Series M Sport, 2.0 petrol coupe, white, under a mile from this car. Mileage: 50,000 miles. Price: £21,260, £2,960 less than this car. Dealer: Hippo Approved in Blackburn. AskCar page: https://askcar.co.uk/car/bmw-4-series-2021-70926018b5c3